Chevrolet 10 Series 1968, Service Manual

Page: 404 / 713

ENGINE FUEL 6M-11
MAINTENANCE AND ADJUSTMENTS
Element Replacement
1. Remove air cleaner cover.
2. Remove element and on two element air cleaners
remove polyurethane band from paper element.
3. Remove bottom section of air cleaner and remove
and discard air cleaner gasket.
4. Clean bottom section of air cleaner and air cleaner
cover thoroughly.
NOTE:
Check bottom section of air cleaner
seal for tears or cracks. Refer to Figure 1A.
5. Install bottom section of air cleaner with a new air
cleaner gasket.
6. Install new paper element on bottom section of air
cleaner with either end up. On two element air
cleaners, install cleaned ployurethane band over
paper element before installing paper element.
7. Install air cleaner cover.
Cleaning Paper Element
1. Remove air cleaner element as previously outlined.
2. Inspect top and bottom seals for deformation or
cracking. These surfaces must be smooth and
uniform.
3. Inspect element for punctures or splits by looking
through the element towards a light bulb.
4. Tap element on smooth flat surface to dislodge dirt
particles being careful not to damage element. Com­
pressed air can be used to clean element if done
very gently and opposite the flow of air to the
carburetor.
5. Internal portions of air cleaner cover and bottom
should be clean. If washed with solvent surfaces
should be dried thoroughly.
6. Install air cleaner element as previously outlined.
Cleaning Polyurethane Band
1. Remove air cleaner element and remove polyure­
thane band from paper element.
2. Inspect the ployurethane band for tears and replace if
necessary. If not torn, wash polyurethane band in
kerosene or mineral spirits; then squeeze out excess
solvent (fig. 5A).
NOTE: Never use a hot degreaser or any sol­
vent containing acetone or similar solvent.
3. Dip element into light engine oil and squeeze out ex­
cess oil.
NOTE: Never shake, swing or wring the ele­
ment to remove excess oil or solvent as this
may tear the polyurethane material. Instead,
F ig . 3 A —
Oil
Bath A ir
C
eaner
"squeeze" the excess oil from the element.
CO N V EN TIO N A L CA B
Fig. 4 A —Carburetor Heat Stove (366 and 427)
CHEVROLET TRUCK SERVICE MANUAL